//
//  Student.m
//  TestDemo
//
//  Created by apple on 2022/1/15.
//

#import "Student.h"

@implementation Student

+(Student *)instanceStudent{
   static Student * _st = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        _st =[[Student alloc]init];
    });
    return _st;
}

-(void)dealloc{
    NSLog(@"%s",__func__);
}

@end
